Battery pack having PCM fixing tape

ABSTRACT

Disclosed herein is a battery pack configured to have a structure including a plate-shaped battery cell having electrode terminals formed at one side thereof including a sealed surplus part and a protection circuit module (PCM) mounted at the sealed surplus part, wherein each of the electrode terminals of the battery cell is made of a plate-shaped conductive member, the PCM includes a protection circuit board (PCB), a safety element electrically connected between one of the electrode terminals of the battery cell and the PCB or loaded on the PCB, an external input and output terminal electrically connected to a protection circuit of the PCB, and an electrically insulative module case in which the PCB and the safety element are mounted in a state in which the external input and output terminal extends outside, the PCM is loaded on the sealed surplus part of the battery cell in a state in which the PCM is received in the module case such that the PCM is electrically connected to the electrode terminals of the battery cell, and the module case includes a PCB receiving part open outward at one side thereof and an adhesive fixing tape is attached to an outer surface of the module case contacting the sealed surplus part.

TECHNICAL FIELD

The present invention relates to a battery pack including a protectioncircuit module (PCM) fixing tape and, more particularly, to a batterypack configured to have a structure including a plate-shaped batterycell having electrode terminals formed at one side thereof including asealed surplus part and a PCM mounted at the sealed surplus part,wherein each of the electrode terminals of the battery cell is made of aplate-shaped conductive member, the PCM includes a protection circuitboard (PCB), a safety element electrically connected between one of theelectrode terminals of the battery cell and the PCB or loaded on thePCB, an external input and output terminal electrically connected to aprotection circuit of the PCB, and an electrically insulative modulecase in which the PCB and the safety element are mounted in a state inwhich the external input and output terminal extends outside, the PCM isloaded on the sealed surplus part of the battery cell in a state inwhich the PCM is received in the module case such that the PCM iselectrically connected to the electrode terminals of the battery cell,and the module case includes a PCB receiving part open outward at oneside thereof and an adhesive fixing tape is attached to an outer surfaceof the module case contacting the sealed surplus part.

BACKGROUND ART

A secondary battery represented by a lithium secondary batteryexhibiting high energy density and operating voltage and excellentretention and service-life characteristics has been widely used as anenergy source for various electronic products as well as various mobiledevices.

Depending upon types of external devices in which secondary batteriesare used, the secondary batteries may be configured to have a detachabletype structure in which the secondary batteries can be easily insertedinto and removed from the external devices or to have an embedded typestructure in which the secondary batteries are embedded in the externaldevices. For example, it is possible for a user to insert or remove abattery into or from a device, such as a laptop computer, as needed. Onthe other hand, a device, such as a mobile phone, requires an embeddedtype battery pack due to the structure and capacity thereof.

Meanwhile, various kinds of combustible materials are contained in thelithium secondary battery. As a result, the lithium secondary batterymay be heated or explode due to the overcharge of the battery, theovercurrent in the battery, or other external physical impact againstthe battery. That is, the safety of the lithium secondary battery isvery low. For this reason, safety elements, such as a positivetemperature coefficient (PTC) element and a protection circuit module(PCM), which are capable of effectively controlling an abnormal state ofthe lithium secondary battery, such as the overcharge of the lithiumsecondary battery or the overcurrent in the lithium secondary battery,are connected to a battery cell of the lithium secondary battery.

In general, an embedded type secondary battery pack uses a plate-shapedbattery cell, which is suitable for electrical connection, and a PCM isconnected to the battery cell via conductive nickel plates by welding orsoldering. That is, the nickel plates are connected to electrodeterminals of the battery cell by welding or soldering, a flexibleprinted circuit board (F-PCB) is attached to one side of a double-sidedadhesive tape, a protective tape is attached to the other side of thedouble-sided adhesive tape, and electrode tabs of the F-PCB and thenickel plates are connected to each other by welding in a state in whichthe F-PCB is in tight contact with the battery cell. In this way, thePCM is connected to the battery cell to manufacture a battery pack.

It is required for the safety elements, including the PCM, to bemaintained in electrical connection with the electrode terminals of thebattery cell and, at the same time, to be electrically isolated fromother parts of the battery cell.

To this end, insulative tapes are attached to various members, includingthe PCM. In addition, a portion of a sealed part of a battery case, inwhich the battery cell is received, is bent, and an insulative tape isattached thereto or a barcode is printed thereon. That is, the processis very complicated.

Since a plurality of insulative tapes or parts is required to achievesafe connection as described above, a battery pack assembly process iscomplicated and manufacturing cost is increased.

In addition, when external impact is applied to the battery pack, thePCM may be damaged or dimensional stability of the battery pack may begreatly lowered due to the use of the insulative tapes, which exhibitlow mechanical strength.

Therefore, there is a high necessity for technology that is capable ofreducing the number of members mounted to the battery cell to simplifyan assembly process, achieving stable coupling between members loaded onthe battery cell, and protecting the PCM.

DISCLOSURE Technical Problem

Therefore, the present invention has been made to solve the aboveproblems, and other technical problems that have yet to be resolved.

Specifically, it is an object of the present invention to provide abattery pack wherein the number of parts necessary to manufacture thebattery pack is reduced, thereby simplifying an assembly process, andstructural stability of the battery pack is improved.

It is another object of the present invention to provide a battery packincluding a module case and a fixing tape having a specific structure toprovide higher electric capacity than other different battery packshaving the same standard while having a compact structure.

Technical Solution

In accordance with one aspect of the present invention, the above andother objects can be accomplished by the provision of a battery packconfigured to have a structure including a plate-shaped battery cellhaving electrode terminals formed at one side thereof including a sealedsurplus part and a protection circuit module (PCM) mounted at the sealedsurplus part, wherein each of the electrode terminals of the batterycell is made of a plate-shaped conductive member, the PCM includes aprotection circuit board (PCB), a safety element electrically connectedbetween one of the electrode terminals of the battery cell and the PCBor loaded on the PCB, an external input and output terminal electricallyconnected to a protection circuit of the PCB, and an electricallyinsulative module case in which the PCB and the safety element aremounted in a state in which the external input and output terminalextends outside, the PCM is loaded on the sealed surplus part of thebattery cell in a state in which the PCM is received in the module casesuch that the PCM is electrically connected to the electrode terminalsof the battery cell, and the module case includes a PCB receiving partopen outward at one side thereof and an adhesive fixing tape is attachedto an outer surface of the module case contacting the sealed surpluspart.

Consequently, the battery pack according to the present invention isbased on the structure including the PCB receiving part open outward atone side thereof and in which the fixing tape is attached to one side ofthe module case and the module case is loaded and fixed to the sealedsurplus part of the battery cell, whereby it is possible to reduce thenumber of parts constituting the battery pack and to simplify thecoupling structure of the battery pack, thereby improving manufacturingprocessability and stability of the battery pack.

In addition, the module case and the fixing tape having the specificstructure as described above is applied to the battery pack according tothe present invention. Consequently, it is possible to provide higherelectric capacity than other different battery packs having the samestandard while having a compact structure.

In a concrete example, the plate-shaped battery cell may be apouch-shaped secondary battery.

Specifically, the pouch-shaped secondary battery may be configured tohave a structure in which an electrode assembly is received in a batterycase made of a laminate sheet including a metal layer and a resin layerin a sealed state. The electrode assembly may be configured to have astructure including a cathode, an anode, and a separator disposedbetween the cathode and the anode and may be received in the batterycase together with an electrolyte in a sealed state.

The secondary battery may be a lithium secondary battery exhibiting highenergy density, discharge voltage, and output stability. Othercomponents of the lithium secondary battery will hereinafter bedescribed in detail.

In general, the lithium secondary battery includes a cathode, an anode,a separator, and a non-aqueous electrolytic solution containing lithiumsalt.

The cathode may be manufactured, for example, by applying a mixture of acathode active material, a conductive material, and a binder to acathode current collector and drying the applied mixture. A filler maybe further added as needed. On the other hand, the anode may bemanufactured by applying an anode material to an anode current collectorand drying the applied anode material. The abovementioned ingredientsmay be further included as needed.

The separator is disposed between the anode and the cathode. Theseparator may be made of an insulative thin film exhibiting high ionpermeability and mechanical strength.

The non-aqueous electrolytic solution containing lithium salt consistsof a non-aqueous electrolyte and lithium salt. A liquid non-aqueouselectrolytic solution, a solid electrolyte, or an inorganic solidelectrolyte may be used as the non-aqueous electrolyte.

The current collectors, the electrode active materials, the conductivematerial, the binder, the filler, the separator, the electrolyticsolution, and the lithium salt are well known in the art to which thepresent invention pertains and, therefore, a detailed descriptionthereof will be omitted.

The lithium secondary battery may be manufactured using an ordinarymethod well known in the art to which the present invention pertains.That is, the lithium secondary battery may be manufactured by disposinga porous separator between a cathode and an anode and injecting anelectrolytic solution thereinto.

The cathode may be manufactured, for example, by applying a slurrycontaining a lithium transition metal oxide active material, aconductive material, and a binder to a current collector and drying theapplied slurry. In the same manner, the anode may be manufactured, forexample, by applying a slurry containing a carbon active material, aconductive material, and a binder to a thin current collector and dryingthe applied slurry.

In the present invention, the sealed surplus part means an upper endsealed part formed when the battery case is thermally bonded in a sealedstate.

Specifically, a sealed part having a surplus space formed at one of thesealed outer circumferences of the battery case formed when theelectrode assembly is disposed in the battery case made of the laminatesheet in a sealed state is referred to as a sealed surplus part.However, the sealed surplus portion may be replaced by terms, such as athermally bonded surplus part and a sealed terrace, as long as thespecified terms have the same meaning as the sealed surplus part.

In a concrete example, the safety element may be an element toeffectively control an abnormal state of the anode and cathode terminalselectrically connected to a device in which the battery pack is mountedand an abnormal state of the battery pack, such as the overcharge of thebattery pack or the overcurrent in the battery pack. Examples of thesafety element may include a positive temperature coefficient (PTC)element, a fuse, and a thermal cutoff or cutout (TCO).

The form of the external input and output terminal is not particularlyrestricted so long as the external input and output terminal can beelectrically connected to the PCB to supply electric current from anexternal device, such as a charger, to the battery cell or to supplyelectric current from the battery cell to a device, such as a mobilephone. In an embedded type battery pack, the external input and outputterminal may be configured in the form of a plate or a wire.

In a concrete example, a base film of the fixing tape is notparticularly restricted so long as the fixing tape is an electricallyinsulative material capable of electrically isolating the sealed surpluspart of the battery cell from the outside and fixing the module case tothe sealed surplus part of the battery cell. For example, the base filmof the fixing tape may be a polycarbonate tape, a Nomex tape, apolypropylene tape, a polyethylene tape, or a polyethylene terephthalatetape.

In addition, an adhesive material may be applied to opposite sides ofthe fixing tape such that the module case can be securely fixed to thesealed surplus part of the battery cell after the fixing tape issecurely attached to one surface of the module case. Furthermore, thefixing tape may have a size corresponding to the width and the length ofthe module case in plane. According to circumstances, the size of thefixing tape may be slightly greater than the width and the length of themodule case in plane such that a surplus portion of the fixing tape canbe attached to the side of the module case. In this way, the fixing tapemay be modified in various forms so long as such modification does notdeviate from the object of the present invention.

In another concrete example, the module case may be configured to have arectangular parallelepiped box structure and the module case may beprovided at the inside thereof with at least one PCB fixing protrusionpart.

As described above, the protection circuit module includes the PCBreceiving part, the PCB fixing protrusion part, and the fixing tapehaving the specific structure. Consequently, it is possible to easilyreceive and fix the PCB and the safety element in the PCB receivingpart. In addition, the module case is configured to have a structurewhich does not require an additional fixing member or protection member.Consequently, productivity is improved through a simplified assemblyprocess. Furthermore, the PCB and the safety element are securely andstably fixed by the PCB fixing protrusion part in a state in which thePCB and the safety element are received in the PCB receiving part of themodule case such that the PCB and the safety element can be electricallyisolated and protected from the outside. Consequently, it is possible toimprove overall mechanical strength of the PCM and to greatly reduce theamount of an insulative tape used as compared with a conventionalembedded type battery pack.

In addition, the outer surface of the module case is smooth without anyadditional member protruding from the module case or mounted at themodule case. As a result, the outer surface of the module case may forma smooth outer surface of the battery pack and, therefore, the batterypack may be manufactured to have correct dimensions and, at the sametime, the battery pack may provide a pleasing external appearance.

Furthermore, the module case including the PCB receiving part having theabove structure and the protective tape having the above structure maybe easily loaded on the sealed surplus part of the battery cell becausethe module case has a rectangular parallelepiped box structure, theouter surface of which is smooth.

As a result, the battery pack according to the embodiment of the presentinvention has a more compact structure than a conventional battery pack.In addition, it is possible to utilize a space occupied by a PCM, a PCMfixing member, or PCM protection members of the conventional batterypack as a space for electrical capacity. Consequently, it is possible toincrease electrical capacity of the battery pack having the samestandard as the conventional battery pack.

Meanwhile, the module case may be configured to have a structureincluding two electrode terminal insertion grooves, into which theelectrode terminals of the battery cell are inserted.

In a further concrete example, the battery pack may further include alabel attached to outer surfaces of the PCM and the battery cellexcluding the external input and output terminal in a wrapping fashion.Consequently, it is possible to more stably secure electrical connectionbetween the electrode terminals of the battery cell and the PCB whilemaintaining insulation of the battery cell.

In accordance with another aspect of the present invention, there isprovided a protection circuit module (PCM), having a specific structure,which is used to constitute the battery pack with the above-statedconstruction.

Specifically, there is provided a PCM loaded on a sealed surplus part ofa plate-shaped battery cell having electrode terminals, each of which ismade of a plate-shaped conductive member, formed at an upper endthereof, wherein the PCM includes a PCB, a safety element electricallyconnected between one of the electrode terminals of the battery cell andthe PCB or loaded on the PCB, an external input and output terminalelectrically connected to a protection circuit of the PCB, and anelectrically insulative module case in which the PCB and the safetyelement are mounted in a state in which the external input and outputterminal extends outside, and the module case includes a PCB receivingpart open outward at one side thereof and an adhesive fixing tape isattached to an outer surface of the module case contacting the sealedsurplus part.

In a general process of assembling an embedded type battery pack, aconnection member and an F-PCM are coupled and an insulative tape isattached at each step such that a PCM assembly is mounted on a batterycell. That is, the PCM assembly is mounted to the battery cell using alarge number of parts. As a result, a large number of processes arerequired. In addition, mechanical strength and structural stability ofthe battery pack are low.

On the other hand, the PCM according to the present invention isconfigured to have a structure in which the safety element is mounted inthe module case in a state in which the safety element is coupled to thePCB. Consequently, structural stability of the battery pack is improvedand a process of manufacturing the battery pack is greatly simplified.

In a concrete example, the external input and output terminal may beconfigured in the form of a plate or a wire in an embedded type batterypack although the form of the external input and output terminal is notparticularly restricted so long as the external input and outputterminal can be electrically connected to the PCB to supply electriccurrent from a device, such as a charger, to the battery cell or tosupply electric current from the battery cell to a device, such as amobile phone.

The other particulars of the fixing tape are the same as thosepreviously described in connection with the battery pack.

In another concrete example, the module case may be configured to have arectangular parallelepiped box structure and the module case may beprovided at the inside thereof with at least one PCB fixing protrusionpart.

In addition, the module case may be configured to have a structureincluding two electrode terminal insertion grooves, into which theelectrode terminals of the battery cell are inserted.

In accordance with another aspect of the present invention, there isprovided a method of manufacturing the battery pack with theabove-stated construction.

Specifically, the method of manufacturing the battery pack includes (a)connecting an external input and output terminal to a PCB by welding orsoldering, (b) connecting the PCB to electrode terminals of a batterycell by welding or soldering, (c) mounting the PCB in a receiving partof the module case having a fixing tape attached thereto, (d) loadingthe PCM on a sealed surplus part of the battery cell such that thefixing tape contacts the sealed surplus part, and (e) attaching a labelto outer surfaces of the PCM and the battery cell excluding the externalinput and output terminal in a wrapping fashion.

In a concrete example, the welding may be spot welding, laser welding,or ultrasonic welding although the welding is not particularlyrestricted so long as electrical connection is achieved by the welding.

In another concrete example, the method of manufacturing the batterypack may include mounting the PCB in the receiving part of the modulecase and attaching the fixing tape to the module case instead of step(c).

As compared with a method of manufacturing a conventional embedded typebattery pack, the battery pack manufacturing method according to thepresent invention reduces the number of manufacturing processes andprovides a battery pack exhibiting improved structural stability.

In accordance with a further aspect of the present invention, there isprovided a mobile device including the battery pack with theabove-stated construction as a power source.

Concrete examples of the mobile device in which the battery packaccording to the present invention can be used may include a mobilephone, a laptop computer, a netbook computer, a tablet PC, and a smartpad.

The above-described devices or apparatuses are well known in the art towhich the present invention pertains and, therefore, a detaileddescription will be omitted.

BRIEF DESCRIPTION OF DRAWINGS

The above and other objects, features and other advantages of thepresent invention will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a perspective view showing a battery pack according to anembodiment of the present invention;

FIG. 2 is an exploded perspective view of the battery pack shown in FIG.1;

FIGS. 3 to 8 are perspective views showing a process of manufacturing abattery pack according to an embodiment of the present invention; and

FIG. 9 is a perspective view showing a module case and a fixing tapeaccording to an embodiment of the present invention.

BEST MODE

Now, exemplary embodiments of the present invention will be described indetail with reference to the accompanying drawings. It should be noted,however, that the scope of the present invention is not limited by theillustrated embodiments.

FIG. 1 is a perspective view showing a battery pack according to anembodiment of the present invention and FIG. 2 is an explodedperspective view of the battery pack shown in FIG. 1.

Referring to these drawings, a battery pack 700 includes a plate-shapedbattery cell 100 having electrode terminals 110 and 120 formed at oneside thereof including a sealed surplus part 130, an electricallyinsulative module case 400 to receive a protection circuit board (PCB)200, and an electrically insulative fixing tape 500 to fix the modulecase 400 to the sealed surplus part 130 of the battery cell 100. Theplate-shaped battery cell 100 and the module case 400 are wrapped by aprotection label 500.

In addition, the PCB 200 is electrically connected to a connection part310 of a plate-shaped external input and output terminal 300. Theexternal input and output terminal 300 extends outward from the modulecase 400. A connector 320 configured to be connected to an externaldevice is formed at one end of the external input and output terminal300.

FIGS. 3 to 8 are perspective views showing a process of manufacturing abattery pack according to an embodiment of the present invention.

Referring to FIGS. 3 and 4, terminal joint parts 210 and 220 of a PCB200 are electrically connected to electrode terminals 110 and 120 of aplate-shaped battery cell 100, respectively, by spot welding (seereference numerals 111 and 121).

After electric connection between the PCB 200 and the electrodeterminals 110 and 120 is achieved, the terminal joint parts 210 and 220of the PCB 200 are bent (see reference numeral 201) such that theterminal connection parts 210 and 220 of the PCB 200 are disposed inparallel to the top and the bottom of the plate-shaped battery cell 100.

Referring to FIG. 4, an external input and output terminal connectionpart 310 electrically connected to an external input and output terminaljoint part 230 of the PCB 200 is directed downward as the result ofbending of the terminal joint parts 210 and 220. In addition, a sealedsurplus part 130 of the battery cell 100 is formed to have the samewidth as the PCB 200.

Referring to FIGS. 5 to 7, the PCB 200 is received in a module case 400,a fixing tape 500 is attached (see reference numeral 501) to one surfaceof the module case 400, and the module case 400 is loaded on the sealedsurplus part 130 of the battery cell 100 by bending of the electrodeterminals 110 and 120.

As a result, an external input and output terminal 300 extending outwardfrom the module case 400 is directed upward.

At this time, the width and the length of the module case 400 loaded onthe sealed surplus part 130 of the battery cell 100 are approximatelyequal to the width and the length of the sealed surplus part 130 of thebattery cell 100.

In addition, the height of the module case 400 loaded on the sealedsurplus part 130 of the battery cell 100 is equal to the thickness ofthe battery cell 100.

Specifically, referring to FIG. 5 together with FIGS. 4 and 9, themodule case 400 is configured to have a rectangular parallelepiped boxstructure, the outer surface of which is smooth and which has noadditional member protruding from the module case 400 or mounted at themodule case 400. In addition, a plurality of PCB fixing protrusion parts421 is formed at the inside of the module case 400.

Consequently, the PCB 200 and a safety element (not shown) are securelyand stably fixed by the PCB fixing protrusion parts 421 in a state inwhich the PCB 200 and the safety element are received in a PCB receivingpart 411 of the module case 400 such that the PCB 200 and the safetyelement can be electrically isolated and protected from the outside.

In addition, the module case 400 is provided at one side surface 430thereof with two electrode terminal insertion grooves 414 and 412, intowhich the electrode terminals 110 and 120 of the battery cell 100 areinserted, respectively.

Meanwhile, the fixing tape 500 is a double-side tape having an adhesivematerial applied to opposite sides thereof. The fixing tape 500 has asize corresponding to the width and length of one side surface of themodule case 400.

As described above, the module case 400 is configured to have anassembly type fastening structure which does not require an additionalfixing member or protection member. Consequently, productivity isimproved through a simplified assembly process.

In addition, the outer surface of the module case 400 is smooth withoutany additional member protruding from the module case 400 or mounted atthe module case 400. As a result, the outer surface of the module case400 may form a smooth outer surface of the battery pack and, therefore,the battery pack may be manufactured to have correct dimensions and, atthe same time, the battery pack may provide a pleasing externalappearance.

Furthermore, as shown in FIG. 7, the module case 400 may be easilyloaded on the sealed surplus part 130 of the battery cell 100 becausethe module case 400 has a rectangular parallelepiped box structure, theouter surface of which is smooth.

As a result, the battery pack according to the embodiment of the presentinvention has a more compact structure than a conventional battery pack.In addition, it is possible to utilize a space occupied by a PCM, a PCMfixing member, or PCM protection members of the conventional batterypack as a space for electrical capacity. Consequently, it is possible toincrease electrical capacity of the battery pack.

Referring to FIG. 8, the outer surface of the battery cell 100 and theouter surface of the module case 400 excluding the external input andoutput terminal 300 are wrapped by a protection label 600.

The label 600, which indicates product information, more stably secureselectrical connection between the electrode terminals 110 and 120 of thebattery cell 100 and the PCB 200 while maintaining insulation of thebattery cell 100.

Although the exemplary embodiments of the present invention have beendisclosed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

INDUSTRIAL APPLICABILITY

As is apparent from the above description, a battery pack according tothe present invention is configured to have a structure including a PCBreceiving part open outward at one side thereof and in which a fixingtape is attached to one side of the module case and the module case isloaded and fixed to a sealed surplus part of a battery cell.Consequently, it is possible to simplify a manufacturing process, toimprove structural stability, to provide a battery pack having a compactstructure, and to provide higher electric capacity than other differentbattery packs having the same standard.

The invention claimed is:
 1. A battery pack configured to have astructure comprising a plate-shaped battery cell having electrodeterminals formed at one side thereof comprising a sealed surplus partand a protection circuit module (PCM) mounted at the sealed surpluspart, wherein each of the electrode terminals of the battery cell ismade of a plate-shaped conductive member, the PCM comprises a protectioncircuit board (PCB), a safety element electrically connected between oneof the electrode terminals of the battery cell and the PCB or loaded onthe PCB, an external input and output terminal electrically connected toa protection circuit of the PCB, and an electrically insulative modulecase in which the PCB and the safety element are mounted in a state inwhich the external input and output terminal extends outside, the PCM isloaded on the sealed surplus part of the battery cell in a state inwhich the PCM is received in the module case such that the PCM iselectrically connected to the electrode terminals of the battery cell,and the module case comprises a PCB receiving part open outward at oneside thereof, and an adhesive fixing tape is attached to an outersurface of the module case contacting the sealed surplus part, themodule case having two long, opposed sides and two short, opposed sides,and at least one PCB fixing protrusion part extending from one of thelong, opposed sides toward the other of the long, opposed sides andspaced from the two short, opposed sides.
 2. The battery pack accordingto claim 1, wherein the plate-shaped battery cell is a pouch-shapedsecondary battery having an electrode assembly received in a batterycase made of a laminate sheet comprising a metal layer and a resin layerin a sealed state.
 3. The battery pack according to claim 2, wherein theelectrode assembly is configured to have a structure comprising acathode, an anode, and a separator disposed between the cathode and theanode and is received in the battery case together with an electrolytein a sealed state.
 4. The battery pack according to claim 1, wherein thesealed surplus part is an upper end sealed part formed when a batterycase is thermally bonded in a sealed state.
 5. The battery packaccording to claim 1, wherein the safety element comprises at least oneselected from a group consisting of a positive temperature coefficient(PTC) element, a fuse, and a thermal cutoff or cutout (TCO).
 6. Thebattery pack according to claim 1, wherein the external input and outputterminal is configured in the form of a plate or a wire.
 7. The batterypack according to claim 1, wherein the fixing tape comprises a base filmselected from a group consisting of a polycarbonate tape, a Nomex tape,a polypropylene tape, a polyethylene tape, and a polyethyleneterephthalate tape.
 8. The battery pack according to claim 7, wherein anadhesive material is applied to opposite sides of the fixing tape. 9.The battery pack according to claim 7, wherein the fixing tape has asize corresponding to a width and a length of the module case in plane.10. The battery pack according to claim 1, wherein the module case isconfigured to have a rectangular parallelepiped box structure.
 11. Thebattery pack according to claim 10, wherein the module case comprisestwo electrode terminal insertion grooves, into which the electrodeterminals of the battery cell are inserted.
 12. The battery packaccording to claim 1, further comprising a label attached to outersurfaces of the PCM and the battery cell excluding the external inputand output terminal in a wrapping fashion.
 13. A protection circuitmodule (PCM) loaded on a sealed surplus part of a plate-shaped batterycell having electrode terminals, each of which is made of a plate-shapedconductive member, formed at an upper end thereof, wherein the PCMcomprises a protection circuit board (PCB), a safety elementelectrically connected between one of the electrode terminals of thebattery cell and the PCB or loaded on the PCB, an external input andoutput terminal electrically connected to a protection circuit of thePCB, and an electrically insulative module case in which the PCB and thesafety element are mounted in a state in which the external input andoutput terminal extends outside, and the module case comprises a PCBreceiving part open outward at one side thereof and an adhesive fixingtape is attached to an outer surface of the module case contacting thesealed surplus part, the module case having two long, opposed sides andtwo short, opposed sides, and at least one PCB fixing protrusion partextending from one of the long, opposed sides toward the other of thelong, opposed sides and spaced from the two short, opposed sides. 14.The PCM according to claim 13, wherein an adhesive material is appliedto opposite sides of the fixing tape.
 15. A method of manufacturing abattery pack according to claim 1, the method comprising: (a) connectingan external input and output terminal to a PCB by welding or soldering;(b) connecting the PCB to electrode terminals of a battery cell bywelding or soldering; (c) mounting the PCB in a receiving part of themodule case having a fixing tape attached thereto, or, first mountingthe PCB in the receiving part of the module case, and then attaching thefixing tape to the module case; (d) loading the PCM on a sealed surpluspart of the battery cell such that the fixing tape contacts the sealedsurplus part; and (e) attaching a label to outer surfaces of the PCM andthe battery cell excluding the external input and output terminal in awrapping fashion.
 16. The method according to claim 15, wherein thewelding is spot welding, laser welding, or ultrasonic welding.
 17. Amobile device comprising a battery pack according to claim 1 as a powersource.
 18. The mobile device according to claim 17, wherein the mobiledevice is a mobile phone, a laptop computer, a netbook computer, atablet PC, or a smart pad.